Rhubarb & Custard Double Brew Nic Salts 10ml 20mg

Overview

The Rhubarb & Custard Double Brew Nic Salts 10ml 20mg by Double in Rhubarb & Custard at 20mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Double Brew Rhubarb and Custard Nic Salt 10ml 20mg at a Glance

Double Brew Nic Salts Rhubarb and Custard is a 10ml bottle of 20mg/ml nicotine salt e-liquid built around a pairing that most British shoppers will recognise from the old-fashioned boiled sweet: sharp, slightly tart rhubarb sitting on top of a smooth, vanilla-led custard. It is a refill format, which means you pour it into a compatible pod or tank yourself rather than buying a sealed, pre-filled unit. It is designed for low-power mouth-to-lung (MTL) devices, which is the setting where nicotine salts behave best.

This page is a plain explainer for UK adults who are considering the bottle. It covers what the specifications actually mean, how the liquid behaves once it is in a device, what the flavour does from the first draw to the last, which kinds of kit suit it, how to fill and look after it, what goes wrong when people use it badly, and how it compares with other 10ml nic salts. We also say who should not buy it, because 20mg/ml is the highest strength allowed in the UK and it is not the right choice for every vaper.

The key facts in short:

• Format: a 10ml bottle of nicotine salt e-liquid, the largest bottle size UK rules permit for liquid containing nicotine.
• Strength: 20mg/ml, which is 2% nicotine by volume and the UK legal maximum.
• Flavour: Rhubarb and Custard, a tart-meets-creamy dessert profile with no deliberate menthol or cooling agent.
• Best used in: refillable pod kits and other low-wattage MTL devices with a coil resistance of roughly 0.8 to 1.2 ohm.
• Not suitable for: sub-ohm tanks, high-wattage devices, non-smokers and anyone under 18.
• Brand: Double Brew, a range that sells its salts across a wide spread of fruit, dessert and ice flavours in the same 10ml 20mg format.

Because single-use disposable vapes can no longer be supplied in Great Britain, refillable kits and bottled salts like this one are now the normal route for people who want a compact, pocketable device without throwing away a battery every few days. That is the context this product sits in, and it is why we spend time below on device choice, charging and recycling rather than only on taste.

Vaping is not risk-free and nicotine is addictive. Products like this are intended for adult smokers who want an alternative to cigarettes, not for anyone who has never smoked.

Specifications and What They Mean in Practice

Spec lists on e-liquid pages can read like jargon, so here is each line translated into what you will notice at the counter, in the pod and in your pocket.

• Bottle volume, 10ml: this is the cap for nicotine-containing e-liquid in the UK. A typical refillable pod holds 2ml, which is also the maximum tank size permitted for nicotine vaping devices, so one bottle fills roughly five pods.
• Nicotine strength, 20mg/ml: multiply 20mg by 10ml and the bottle holds 200mg of nicotine in total. A full 2ml pod therefore carries about 40mg. That figure matters for storage and child safety as much as for personal use.
• Nicotine type, nic salt: nicotine salt is nicotine bound to an acid, commonly benzoic acid, which lowers the harshness of the throat hit and lets nicotine reach the bloodstream relatively quickly. It is the reason 20mg/ml salts feel smoother than the same strength in a freebase liquid.
• Base mix: nic salts are usually sold with a balanced or propylene glycol (PG) leaning base, which wicks well in small coils. The exact PG/VG split is printed on the label, so check the bottle you receive rather than relying on a general rule.
• Flavour: Rhubarb and Custard, a dessert-fruit blend.
• Packaging: child-resistant cap, tamper-evident seal and the mandatory nicotine warning and ingredient list on the label.
• Intended device class: pod kits and low-power MTL tanks, not sub-ohm.

A word on what these numbers do not tell you. The bottle does not have a battery, a coil or a puff count of its own, because it is only the liquid. When people ask how many puffs a 10ml bottle gives, the honest answer is a range. As a working estimate, a moderate-power pod kit at around 12 to 18 watts produces somewhere between 200 and 300 puffs per millilitre, so a 10ml bottle lands in the region of 2,000 to 3,000 puffs. Longer draws, higher wattage and warmer vapour use more liquid; short sips on a low setting stretch it out.

Compared with a disposable, the maths is worth a look. Many sealed disposables were marketed on 600 puffs for a 2ml pre-fill. A 10ml bottle supplies about five of those fills, so the liquid side of the cost is spread across far more vaping. You do take on the work of filling and the cost of a reusable device, but you stop paying for a new battery and shell every few days.

One last specification point: shelf life. Nicotine e-liquid is best used within the date marked on the bottle (the best-before date), kept cool, dark and sealed. Heat and sunlight darken the liquid and can make the nicotine taste sharper over time.

Vapour and Throat Hit: Performance and Puff Delivery

Performance with an e-liquid is a combination of what is in the bottle and what the device does with it. In a properly matched pod kit, Double Brew Rhubarb and Custard 20mg is a liquid that delivers a steady, moderate cloud and a throat hit that most vapers would call soft to medium. That is the characteristic of nicotine salts at this strength: the nicotine is there and it registers, but the harsh scratch you would get from 20mg freebase is largely absent.

What to expect on each draw:

• Vapour volume: modest. MTL devices restrict airflow on purpose, so you inhale a small, dense puff into your mouth first and then into your lungs. Do not expect big clouds. If cloud chasing is the goal, nic salts at 20mg are the wrong tool.
• Throat hit: gentle but noticeable. The tart rhubarb note can add a slight brightness at the back of the throat that is flavour rather than harshness.
• Nicotine delivery: relatively quick for a vape. Many users find a few draws are enough to settle a craving, which is the point of a salt format, and also the reason you should not chain vape on it.
• Consistency: custard-style liquids can feel slightly thicker on the tongue than fruit-only blends, but in a standard pod the wicking is fine as long as the coil is primed and power is kept sensible.

Power matters more than people expect. Run the device too low and the vapour feels thin and the custard note turns muted. Run it too high and the liquid heats beyond what a salt needs, giving a hot, slightly scorched, sugary taste and burning through the bottle quickly. For most pod kits the sweet spot is toward the lower-middle of the device range, and many fixed-output pods already sit there by design.

Puff delivery over the life of a pod is also worth describing. A fresh coil and a freshly filled pod give the cleanest flavour for the first day or two. After that, sweet dessert liquids leave a little residue on the coil, which slowly dulls the flavour. That is normal and is the reason coils are a consumable, covered in more detail in the coil section below.

Draw style also changes the experience. A slow, steady four-second draw gives the most flavour and the least liquid use. Short, sharp pulls can cause the coil to heat unevenly and make the vapour feel harsher, while a very long draw on a high setting will drain a pod quickly. Take a moment to find the pace that suits your device, then keep to it.

Flavour Profile: What Rhubarb and Custard Tastes Like

Rhubarb and custard is a classic British combination, and the e-liquid version follows the same logic as the boiled sweet and the school-dinner pudding. There are two halves working together: a tart, slightly sour fruit and a sweet, rounded cream. Whether you enjoy it depends on how you feel about that contrast.

Here is how the flavour tends to unfold on a typical draw:

• Inhale: the rhubarb arrives first. It reads as a sharp, juicy stalk note, a little like stewed rhubarb with a pinch of sugar rather than the raw, stringy vegetable. There is a light tang that wakes the palate.
• Middle of the draw: the custard comes through. Expect a smooth vanilla-cream sweetness that softens the tartness and gives the vapour body.
• Exhale: the finish is mostly custard, with a faint rhubarb tang lingering at the edges of the tongue. Vanilla-forward, creamy, and lightly sweet.
• Aftertaste: short and sweet. It does not sit on the tongue like a heavy bakery dessert, though it is noticeably richer than a pure fruit liquid.

Sweetness sits in the middle to high range. This is a dessert e-liquid, not a crisp, dry fruit, so if you prefer subtle, low-sweetener flavours you may find it a little sugary. On the other hand, the acidity of the rhubarb stops the custard from becoming cloying, which is the reason the pairing works in the first place.

The flavour contains no deliberate menthol or ice. If you want a cold finish, you will need a different variant. Equally, if you are coming from heavily iced liquids, this will feel warmer and softer in the mouth.

A few practical notes on how flavour behaves in use:

• Vaper's tongue: after a long session on a single sweet flavour, taste can seem to fade. Swap to water, or a different flavour for a day, and the profile returns.
• Coil age: a new coil shows the custard at its smoothest. As the coil ages, the rhubarb tends to disappear first and the sweetness takes over.
• Temperature: lower power keeps the rhubarb distinct. Higher power flattens it into a general sweet cream taste.
• Storage: if the bottle has been in a hot place, the vanilla can taste darker and a bit caramelised. Keep it cool.

This is a flavour for people who like a dessert vape with some bite. It will not suit those who want a pure fruit or a cold, mentholated finish.

Bottle Design, Packaging and Build Quality

With e-liquid, build quality means the bottle, the cap, the nozzle and the label, because those determine whether the liquid arrives intact, fills your pod cleanly and stays safe in a house with children or pets. Double Brew uses the standard UK 10ml format, which is the only legal size for nicotine liquid, so the bottle is compact and pocket-friendly.

What you can expect from the packaging:

• Soft plastic bottle with a fine-tip nozzle: the narrow tip fits the fill ports on most pod kits. A gentle squeeze is enough, so you control the flow drop by drop rather than flooding the port.
• Child-resistant cap: required by UK regulations for nicotine e-liquid. It needs a press-and-turn action, which is deliberately awkward. Always close it fully after use.
• Tamper-evident seal: a break-away ring or seal confirms the bottle has not been opened before you use it. If it arrives broken, do not use it and contact the shop.
• Compliant label: nicotine content, ingredients, batch information, health warning and supplier details are printed on the outside. Read the PG/VG ratio and best-before date when you open the box.

On build quality, the points that matter day to day are whether the nozzle drips when you flip the bottle, whether the cap threads smoothly and whether the plastic is firm enough to hold its shape in a bag. Soft-sided bottles can sweat or weep slightly in warm pockets, so store the bottle upright and inside a small bag, a case or a zip pocket rather than loose with keys and coins.

Keep the bottle away from children and pets at all times. Even a small amount of nicotine liquid can be harmful if swallowed or absorbed through skin. If you spill any on your hands, wash with soap and water. In an emergency involving ingestion, seek medical help straight away.

Packaging and recycling are part of responsible use. Empty e-liquid bottles are small plastic items. Once the bottle is empty, check your local council guidance, because some will accept rinsed small plastics in household recycling and others will ask for general waste. Do not pour leftover liquid down the drain. Batteries and devices are a different category entirely: vape devices, pods with batteries and charging cables count as waste electrical equipment and should go to a council recycling centre or a retailer take-back point, never into household bins. Many UK vape shops and electrical retailers operate drop-off points for exactly that purpose.

Devices, Battery and Charging: Choosing the Right Kit for This Liquid

The bottle has no battery, so the first question is what to put it in. A battery-powered device does the heavy lifting here, and the match between device and liquid determines most of your experience.

Good choices for a 20mg Rhubarb and Custard nic salt are:

• Refillable pod kits: compact devices with a replaceable pod or cartridge and a built-in battery. Families such as the Uwell Caliburn, Vaporesso XROS, OXVA Xlim and Aspire Vilter ranges are common examples sold in the UK.
• Low-wattage MTL pen styles: slim devices with a small coil and a tight draw, where you can adjust the power in a narrow range.
• Starter kits: a pod, a battery and a charging lead in one box, which is a sensible route if you are switching from a disposable.

Battery capacity is where devices differ. Many pod kits carry a built-in lithium-ion cell somewhere between 400mAh and 1000mAh. A 500 to 700mAh device will usually get a moderate vaper through most of a day, while a 1000mAh battery will stretch to a day and a half. Heavier use, higher power and cold weather all shorten that. Treat those figures as general guides, because actual capacity depends on the particular device you buy.

Charging advice for any device you use with this liquid:

• Use the cable supplied with the device or a quality USB-C cable from a known brand.
• Plug into a standard wall adapter or a computer port, not a cheap unbranded fast charger.
• Do not leave a device charging overnight, unattended or on soft furnishings such as a bed or sofa.
• Do not charge a battery that is swollen, hot, damaged or has a cracked casing. Stop using it and recycle it safely.
• Keep the charging port and the pod contacts clean and dry. A tiny leak of sticky liquid can corrode the contacts over time.

Draw-activated devices (no button, simply inhale) are the most forgiving for beginners, because they fire only while you draw. Button-fired kits give you more control but also make it easier to over-fire and burn the coil. If you are unsure, start with a draw-activated pod.

When a device reaches the end of its life, remember that it contains a lithium-ion battery. Take it to a household recycling centre or a retailer drop-off point. Putting it in the bin is a fire risk in refuse lorries and it is also against the rules for waste electricals.

Coil and Mesh Technology: What Suits 20mg Salts

The coil is the small heating element inside the pod or tank that vaporises the liquid, and it is the single biggest factor in how a nic salt tastes. Salts are designed for coils with higher resistance than the large, low-resistance coils used with freebase sub-ohm liquids.

For Double Brew Rhubarb and Custard 20mg, aim for:

• Resistance: roughly 0.8 to 1.2 ohm for pod-style MTL kits. Anything below about 0.6 ohm tends to deliver too much vapour and too much nicotine for a 20mg salt.
• Power range: about 10 to 20 watts, depending on the coil. The coil packaging usually prints a recommended range, and the middle of that range is a good starting point.
• Wicking material: organic cotton is the usual standard. It carries sweet, creamier liquids reliably when primed.

Mesh versus traditional wire coils is the main design choice. A mesh coil uses a flat screen of metal with many tiny holes, which spreads heat over a larger surface and produces a more even vaporisation. In practice it often gives a slightly smoother draw and a more consistent flavour from the first puff to the last. A traditional round-wire coil heats a narrower strip, which can be a little sharper on flavour at low power but wears faster in sweet liquids. Both work with this liquid, so the better question is which your device uses and whether the coil resistance falls within the MTL range.

Sweet dessert flavours like custard leave a thin film on the coil as the sugars and flavouring compounds caramelise. That film is the main reason a coil dulls over time. As a rule of thumb, a coil lasts one to two weeks with regular use, though it varies with power, how often you vape and how sweet the liquid is. Signs it is time to change:

• Flavour turns flat, scorched or noticeably more sugary and less fruity.
• The vapour feels thin even at a normal power setting.
• You taste a burnt note after a fresh fill.
• The pod gurgles or crackles more than before.

To get the best from a new coil, prime it: drop a few drops of liquid directly on the coil cotton, fill the pod, then wait five to ten minutes before the first draw. Skipping this is the most common cause of a burnt first taste.

Finally, avoid using 20mg nic salts in sub-ohm tanks or high-wattage devices. They push far more liquid and nicotine into each draw than the strength is designed for, and the result is harsh, expensive and unpleasant.

Nicotine Strength Guidance: Is 20mg/ml Right for You?

The strength on this bottle is 20mg/ml, the maximum permitted in the UK for any nicotine vaping product. It exists to help heavier smokers move away from cigarettes without feeling short-changed, but it is easy to overshoot if you are a lighter smoker or new to vaping. The following is general information, not medical advice.

• 20mg/ml: suits adults who smoke around 10 or more cigarettes a day, or who need a strong nicotine hit to avoid going back to smoking. Taken lightly, it can still be too much for some people.
• 10mg/ml: a common mid-point for people who smoke around 5 to 10 cigarettes a day, or who find 20mg/ml too strong in salt form.
• 5mg/ml or lower: better for lighter smokers or as a step-down stage as you reduce nicotine over time.

Signs that 20mg/ml is too strong include nausea, dizziness, headaches, a racing heart, sweating or an unpleasant tight chest after vaping. If that happens, stop vaping, drink some water, get fresh air and consider a lower strength or a different device. Signs it may be too weak, on the other hand, include chain vaping, returning cravings within minutes and falling back to cigarettes.

A few useful principles when choosing:

• Match your smoking history: your current cigarette count is a better guide than guesswork. If you are unsure, the NHS stop smoking service can help you pick a plan.
• Match the device: salts at 20mg/ml belong in low-power pods. Putting the same liquid in a high-powered mod makes the nicotine dose much larger per puff.
• Plan to step down: many people start at 20mg/ml, then move to 10mg/ml after a few weeks as cravings settle. The goal is usually less nicotine over time, not the same amount indefinitely.
• Do not use it if you have never smoked. Nicotine is addictive, and the strength here is meant for people who already use nicotine.

If you are pregnant, breastfeeding, have a heart condition, or are taking medication, talk to a pharmacist, GP or stop smoking adviser before using any nicotine product. Also, remember that any amount of nicotine liquid is a danger to children and pets, so store the bottle somewhere out of reach.

Who Rhubarb and Custard Is For, and Who Should Skip It

No flavour or strength suits everyone. Here is an honest breakdown of who tends to enjoy this bottle and who is likely to be disappointed.

This is likely a good fit if you:

• Are an adult smoker moving to vaping and need a 20mg/ml strength to stay off cigarettes.
• Prefer sweet, dessert-style flavours with a bit of tartness rather than menthol or ice.
• Use a refillable pod kit or a low-power MTL device and want a liquid that suits it.
• Used to buy disposables and want a more cost-conscious, less wasteful route now that single-use vapes are off the shelves.
• Like British-sweet flavours and enjoy nostalgic combinations.

You may want to look elsewhere if you:

• Smoke fewer than around five cigarettes a day. A lower-strength salt will be easier on the throat.
• Have never smoked or have stopped smoking. Do not start nicotine for a flavour.
• Vape in a sub-ohm tank or a high-power mod. You need a lower-strength, higher-VG freebase liquid for those, not a salt.
• Want a cooling finish. This flavour does not include menthol.
• Dislike sweet liquids or find rhubarb too sour. Fruit-only blends or tobacco flavours may suit you better.
• Are under 18. It is illegal to sell nicotine vaping products to anyone under 18 in the UK, and we ask for age verification.

It is also worth being honest about the experience of a single-flavour bottle. If you vape heavily, a 10ml bottle of a sweet flavour can start to taste repetitive by day three or four. Many regular vapers keep two or three flavours in rotation, one dessert, one fruit, one cooler option, and switch between them to avoid flavour fatigue. If that sounds like you, consider pairing this bottle with a contrasting variant from the same range.

Finally, think about the occasion. A creamy custard vape suits a relaxed evening or a coffee break. If you are mostly vaping on a commute or in the gym, you may prefer something crisp that cleans the palate. Neither is better, just different, and choosing on that basis will leave you happier with the bottle.

How to Fill and Use Double Brew Rhubarb and Custard

Filling a pod is straightforward, but doing it carefully saves you from leaks, flooded coils and a sticky pocket. These steps apply to most refillable pod kits. Always follow your device manual if it says otherwise.

• Step 1, prepare: wash and dry your hands, find a stable surface and put the device on a tissue. Check the bottle seal is intact before first use.
• Step 2, open the pod: remove the pod from the device and open the fill port. This is usually a silicone plug on the side or top. Some devices have a slide cover instead.
• Step 3, fill gently: insert the nozzle and squeeze slowly. Stop at the maximum fill line. Do not fill into the central airflow tube, because that is the quickest way to cause leaks and gurgling.
• Step 4, seal: press the plug back into place, wipe off any spilled liquid and reinsert the pod.
• Step 5, wait: let a new coil soak for five to ten minutes. Take a couple of gentle priming draws without pressing the button, if your device allows it.
• Step 6, vape: take slow, steady draws of three to four seconds with brief pauses between puffs. Let the coil cool for a few seconds between draws.
• Step 7, close the bottle: screw the child-resistant cap back on until it clicks. Store upright, away from children, heat and sunlight.

Everyday tips that make the liquid last longer and taste better:

• Refill when the pod is about a quarter full, rather than letting it run completely dry. A dry coil burns quickly.
• Rinse the pod with warm water and air dry fully if you switch flavours, because sweet custard can ghost into the next flavour.
• Do not mix different brands or strengths in the same pod. Salt nicotine is not meant to be mixed with other liquids at random.
• Do not top up shortfill or unflavoured bases into this bottle. The nicotine content is calibrated for the liquid as supplied.
• Keep a spare coil handy so you do not have to push through a flat-tasting pod at the weekend.

When you are not using the device, store it upright with the mouthpiece up, so the liquid settles away from the airflow channel. Avoid leaving it on a car dashboard or in a warm pocket. Heat causes the liquid to expand and push out of the pod.

Troubleshooting: Common Problems and How to Fix Them

Most problems with salts are device or technique problems rather than a fault in the liquid. Here is a practical checklist for the issues that come up most often.

• Burnt taste straight after a refill: the coil was not primed. Let the pod sit for ten minutes, take a few gentle draws without pressing the button, then try again. If the burnt taste persists after a day, swap the coil.
• Flat or muted flavour: the coil is likely worn, or you have vaper's tongue. Change the coil, rinse your mouth with water and give your palate a rest from sweet flavours.
• Leaking from the pod: usually overfilling or a poorly seated plug. Empty the pod, wipe it clean, refill below the max line and check the silicone seals are in position. Cold-to-warm pocket changes can also push liquid out, so store the device upright.
• Gurgling or spitting: liquid has flooded the airflow tube. Blow gently through the mouthpiece with the pod removed, wipe the tube and let it settle before use.
• Harsh throat hit: power is too high, or 20mg/ml is simply too strong for you. Lower the wattage first. If it still feels too harsh, a lower strength is the right fix.
• Dry hit: the pod is almost empty, or the cotton is not saturated. Refill and wait. Never keep vaping through a dry hit because it damages the coil.
• Device will not fire: check the pod is seated properly, the contacts are clean and the battery is charged. If the device flashes a low-battery warning, charge before further troubleshooting.
• Sticky device or charging port: spilled liquid has crept into the contacts. Switch off, unplug, wipe carefully with a dry cloth or a slightly damp cotton bud and let the device dry completely before charging.
• Dizziness, nausea or headache: stop vaping, sit down, drink water and get fresh air. Consider a lower strength.
• Liquid darker than expected: mild darkening over time is normal with vanilla and cream flavours. If the liquid also smells off or has changed texture, do not use it.

If none of this helps, contact us with your order number and a short description of the issue, plus a photo of the bottle, the batch information and the device if relevant. We can check the batch details and advise on the next step. Fault reports are easier to resolve when we know which device and coil you are using.

Value for Money and How It Compares With Other 10ml Nic Salts

Value for an e-liquid comes down to three things: the price per millilitre, how long the bottle lasts in your device, and whether the flavour is one you actually want to keep vaping. Judging only by the sticker price per bottle can be misleading, because the cost per puff or per day tells you more.

Where Double Brew sits in the market:

• Against disposables: a bottle of nic salt generally works out much cheaper per puff than a pre-filled single-use device, and it produces no throwaway battery. Disposables have also been removed from sale in Great Britain, which makes refills the straightforward alternative.
• Against other 10ml nic salt ranges: well-known ranges such as Elfliq, IVG, Hayati and Bar Juice all sell comparable 10ml salts at 10mg/ml and 20mg/ml. They offer similar bottle sizes and similar low-power device compatibility. Some of them have larger flavour catalogues or more strength options, while Double Brew is aimed at straightforward 20mg dessert and fruit choices. Price differences between ranges are usually small on a per-bottle basis and vary by retailer, so compare the per-ml price on the day you buy.
• Against freebase shortfills: shortfills are 50ml or 100ml bottles for sub-ohm tanks, with nicotine added separately. They are cheaper per ml, but they are a different product for a different style of vaping and do not suit pod kits.
• Against bulk multi-packs: if you vape daily, buying several salts at once is usually cheaper per bottle than single purchases, and it lets you rotate flavours.

Fair points against this particular bottle. Rhubarb and custard is a niche pairing, so if you are not sure you like the combination, a smaller trial is wiser than buying a big stock. The 20mg/ml strength narrows the audience to smokers who want a strong nicotine hit. And a 10ml bottle is a small volume, so heavier users will go through one in a few days.

Where it holds up well: the flavour has a clear identity rather than a generic fruit-candy taste, the salt format is smooth at 20mg, and the bottle works in any standard MTL pod without special adaptors. To keep costs down, look after your coils, refill before the pod is empty and avoid running the device above the recommended wattage range.

On balance, it is a reasonable choice for an adult smoker who wants a creamy, tart dessert flavour at full strength in a pod kit, and not a sensible purchase for anyone who does not already smoke.